Question: What Does Big Cam Mean?

Is Duramax better than Cummins?

About Duramax Engines Duramax engines can be found in Chevrolet and GMC vehicles, such as the Chevy Silverado and GMC Sierra.

Their high horsepower and torque outputs directly compete with Cummins engines, as well as PowerStroke.

In addition to durability, Duramax engines are known for their quiet performance..

What is a big cam Cummins?

In the late 1970’s and 80’s, the Cummins 855 Big Cam was the king of the road when it came to semi-truck diesel engines. … At the time of its inception it was not only the most powerful engine available, but the most fuel efficient, the most reliable, and the first engine to meet noise and emissions regulations.

What is considered a long duration cam?

Performance cams typically have durations ranging from 220 up to 280 degrees or more. The longer the duration, the rougher the idle and the higher the cam’s power range on the rpm scale. A cam with a duration of 240 degrees of higher will typically produce the most power from 3,500 to 7,000 rpm.

Does a bigger cam give more power?

Performance cams increase the duration and timing of the valve openings during the engine stroke, increasing horsepower and making your car accelerate more quickly. You’ll idle slightly rougher with a performance cam, but get a throaty rumble that’s desirable for some gearheads, depending on your vehicle.

What makes a cam lumpy?

what makes the cam have that lumpy sound? The overlap of the exhaust valve closing and intake valve opening causes the engine to be inefficient at low speed which results in the lumpy idle. The closer the Lobe Seperation Angle the more the overlap, the more duration the more (typically) the overlap.

What do cam numbers mean?

Most common specs for an engine would be for example. 210/218 at 0.551/0.556 at 113 degrees . The first two numbers are the degrees of opening being 210 for the intake and 218 degrees for the exhaust given normally at . … The next two numbers are the valve lift of intake and exhaust in thousands of an inch.

What is considered a mild cam?

A mild cam is usually a little bigger than the stock cam. Most of the “Mild” cams have just a bit of lope to them and will give you a bit more power than the stocker.

Which Cummins Engine is the best?

The Cummins 12-valve is hilariously simple and reliable, but what puts it over the top as the greatest diesel pickup truck motor of all time is how easily it can be modified to produce hilarious power numbers.

What Is a Stage 2 cam?

Stage 2 simply means that tuners are able to increase the horsepower substantially by giving you more peak horsepower higher up the rev range than stock but you will notice the torque loss in the lower RPM than stock.

What Cam is best for a 350?

COMP Cams CL12-600-4COMP Cams CL12-600-4 Camshaft For 350 Chevy – Best Top Pick Review. COMP Cams CL12-600-4 camshaft option is our top pick, and for good cause. With its many great features that will increase the performance of your 350 Chevy significantly, this choice will give you the most horsepower for the most cost-effective price.

What are the worst diesel engines?

Introduced mid-2003, the Ford 6.0L turbo is by far the worst modern diesel engine. It’s so bad, in fact, that Navistar (Powerstroke’s parent company) and Ford had a legal battle over it. The list of issues ranges from head gasket problems to catastrophic fuel system failures.

What is an aggressive cam?

In summary, an aggressive cam is one with large acceleration (both positive and negative), jerk and ramp velocity. An aggressive cam will open and close quickly, i.e. will have low Intensity.

Is a 5.9 or 6.7 Cummins better?

Since the 5.9l is an older engine, you would expect it to be somewhat less efficient. However, due to the more stringent EPA emission rules, the 6.7l has additional filters and redactors. This makes it cleaner, sure, but the tradeoff is a noticeably lower fuel economy.

Do roller rockers add horsepower?

For engine applications that demand a step up, replacing the stock stamped or cast steel rockers with aluminum roller rockers will typically produce a gain of 10 to 15 hp with the same lift ratio, and even more of a power gain with a higher lift ratio.

What does a bigger cam do for an engine?

Double Overhead Cam The main reason to use double overhead cams is to allow for more intake and exhaust valves. More valves means that intake and exhaust gases can flow more freely because there are more openings for them to flow through. This increases the power of the engine.